Sell it and buy a 4.8 or 5.3 powered truck. The LS motor is way better than the SBC. Your 5 speed wont hold a V8, or they would have offered it with the V8. It might work, but not for long.
Narrator: [Talking slowly] And this button-down, Oxford-cloth psycho might just snap, and then stalk from office to office with an Armalite AR-10 carbine gas-powered semi-automatic weapon, pumping round after round into colleagues and co-workers. This might be someone you've known for years. Someone very, very close to you.